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which has the peculiarity of having the shortest cannon bones of
any Ruminant.     Its name denotes its r>mgc:.

I**   ^

The Mask Ox,            wn^'katus, has been tlionglit to be on
the horderLmd i«imTeen the Sii^ep and Oxen, as indeed expressed
in its scientific nama It is a purely Arctic creature, now con-
fined to the Nearotic region; but it formerly existed in the
Arctic regions, of Europe.
Th« auatoiuy of the " soffc parts" of this genus has lately
been investigated by Dr. Ixinnberg.1 The aninial lias no foot
glands such as occur in Ot'is. Its kidneys, however, are non~
lobate, and it has orbital glands. The cotyledons of the placenta
ace unusually large, and the cow has the " primary foux " teats.
It caiinot, in fact, be definitely referred to either the Caprine or
the Bovine section of the CaTieoraia, and while possibly most allied
to J3toforws, it may be regarded, at least for the present, as
entitled to form a separate sub-family of its own. The muzzle
. Sec. 1900, p. 142,